US soldiers participate in an Air Assault training course at a US Army base in Dongducheon, 40 km north of Seoul, on February 26, 2013. Thousands of US troops converged on S.Korea on Friday for the ... more 

US soldiers participate in an Air Assault training course at a US Army base in Dongducheon, 40 km north of Seoul, on February 26, 2013. Thousands of US troops converged on S.Korea on Friday for the start of annual joint military exercises, a report said, as tensions run high on the peninsula following N.Korea's third nuclear test less